Dive deep into tool technology, share practical usage tips
Tudousi Tools offers a collection of practical online utilities. This article introduces the most popular features including encryption, regex testing, text processing, sharing usage tips and scenario cases to boost developer productivity.
Key Derivation Functions bridge weak passwords and strong keys. This article systematically covers the core properties of KDFs and compares the four mainstream algorithms PBKDF2, bcrypt, scrypt and Argon2 in terms of principles, parameter selection and security, with complete JavaScript code examples using Web Crypto API, bcrypt, noble-hashes and argon2-browser plus best practices for parameter selection.
Color is the most intuitive visual language in interface design. This article systematically explains the conversion principles of color formats such as HEX, RGB, HSL, HSV, and CMYK, combined with the WCAG contrast standard and palette generation algorithms, providing frontend code examples and 60-30-10 design practices to help you master color tools.
Time zones are an unavoidable fundamental issue for distributed teams. This article systematically explains time zone division, UTC and GMT principles, Daylight Saving Time mechanisms, JavaScript time zone handling (Date, Intl.DateTimeFormat), cross-timezone collaboration pain points and best practices, with major time zone city comparison tables, API comparisons, and complete code examples to help you build reliable global applications.
Tokens are the core concept of LLM billing and performance. This article deeply explains token definitions, differences between Chinese and English tokens, billing models of various models, teaches you how to accurately estimate token counts, and how to reduce AI application costs through prompt optimization and caching strategies.
PDF is one of the most commonly used document formats in work and study. This article explains PDF format principles, common processing techniques (merge, split, compress, convert, encrypt, sign), and how to efficiently use online PDF tools to improve productivity.
UUID is the most commonly used unique identifier scheme in distributed systems. This article explains the generation principles, pros and cons, and use cases of UUID v1/v3/v4/v5/v7, analyzing database index performance, sortability, and security to help you choose the most suitable UUID version.
Data visualization is a key skill for conveying data insights. This article explains applicable scenarios, design principles, and common pitfalls of 12 common chart types including line charts, bar charts, pie charts, scatter plots, radar charts, and heatmaps, helping you choose the most suitable chart type and improve data presentation skills.
Images are the main bottleneck of web page loading performance. This article deeply explains image compression principles, compares the characteristics of JPEG/PNG/WebP/AVIF formats, covers frontend compression implementation methods like Canvas API and Web Workers, and optimization best practices like responsive images and lazy loading.
Cron is the de facto standard for scheduled tasks, but its concise syntax is error-prone. This article systematically explains Cron expression syntax rules, field meanings, special character usage, gets you started quickly with numerous practical examples, and shares common pitfalls (OR relationship between day and weekday, timezone issues) and best practices.
Passwords are the first line of defense in cybersecurity. This article explores the core principles of password security, including entropy calculation, common attack methods (dictionary attacks, brute force, rainbow tables), password generator principles, password manager architecture, and modern security technologies like multi-factor authentication.
The rapid development of quantum computing poses a great challenge to existing cryptosystems. This article introduces the core concepts of Post-Quantum Cryptography (PQC), including five major technical directions: lattice-based, hash-based, code-based, multivariate, and isogeny-based cryptography. It explains NIST-standardized algorithms like ML-KEM, ML-DSA, SLH-DSA, as well as hybrid encryption strategies and migration roadmaps.
JSON Web Token is one of the most commonly used authentication schemes in modern web applications. This article dives deep into JWT structure (Header, Payload, Signature), working principles, common application scenarios, detailed security analysis (XSS, CSRF, algorithm confusion attacks), and production best practices.
Elliptic Curve Cryptography is an important direction of modern public-key cryptography. This article deeply explores the mathematical principles of ECC, common curves (secp256r1, secp256k1, Curve25519), and implementation details of ECDSA digital signatures and ECDH key exchange, analyzing security and performance advantages.
RSA is by far the most well-known public key cryptography algorithm, widely used for data encryption, digital signatures and key exchange. Starting from mathematical foundations like large prime factorization and Euler's theorem, this article explains RSA key generation, encryption/decryption, digital signature principles, security and performance analysis, and comparisons with ECC/SM2 elliptic curve algorithms.
Online tools require efficient data storage solutions to enhance user experience. This article dives into the local storage technologies used by Tudousi Tools, including localStorage, sessionStorage and IndexedDB, analyzing best practices and performance optimization strategies in tool applications.
National cryptographic algorithms are China's independent encryption standards. Using Tudousi Tools encryption feature as an example, this article explains SM2, SM3, SM4 algorithms and demonstrates how to implement national encryption in frontend tools to ensure data security.
AES is the most widely used encryption algorithm in online tools. Starting from AES principles, this article explains symmetric encryption implementation in frontend tools with Tudousi Tools encryption module as a reference.
Fast response is crucial for online tools. This article shares Tudousi Tools performance optimization experience including image lazy loading, WebP conversion, code compression to help build smoother tool applications.
Regular expressions are the core of text processing tools. Using Tudousi Tools regex tester as an example, this article systematically covers common patterns, performance tips and best practices in tool development.
JSON is one of the most important data exchange formats in modern web development. This article covers JSON formatting, parsing and serialization best practices, including safe parsing, circular reference handling, data compression and other techniques.
URL encoding is a fundamental technology in web development. Proper encoding handling prevents many common issues. This article explains URL encoding principles, differences between encodeURI and encodeURIComponent, and best practices in search parameters, form submission and API requests.
Base64 is a method to encode binary data into ASCII strings, widely used in data transmission and storage. This article explores Base64 principles, use cases, methods and security considerations to help you use this encoding technology correctly.
Timestamps are a common way to represent dates and times in computing. They are simple, precise and easy to handle. This article explores timestamp principles, conversion methods and practical applications in database storage, caching and data sorting.
Hash algorithms are the foundation of cryptography, widely used in password storage, data integrity verification and deduplication. This article explains MD5, SHA-1, SHA-256 and other common hash algorithms, their characteristics, security and applications.
QR codes have become indispensable in daily life, from payment codes to business cards. This article explores QR code principles, capacity, error correction levels, generation methods and applications in mobile payments, information sharing and logistics tracking.